Half-closed pipe type soil sampler

Abstract

The invention provides a semi-closed pipe type soil sampler, which comprises a sampling barrel, the rear end of the sampling barrel is connected with a drill pipe connecting pipe, and the front end of the sampling barrel is provided with a blade, and is characterized in that the sampling barrel is formed by splicing two semi-closed pipes, the front ends and the rear ends of the two semi-closed pipes are respectively connected with an outer cavity and the drill pipe connecting pipe to hoop and fix the outer cavity and the drill pipe connecting pipe, and an opening and closing cable spring is arranged in the outer cavity; an opening and closing claw of the opening and closing cable spring faces the rear end, the blade is movably connected to the front end of the outer cavity in an inserted mode and movably connected with the outer cavity in a telescopic mode, the rear end of the blade is inserted into the opening and closing cable spring, and opening and closing of the opening and closing claw of the opening and closing cable spring are controlled through front-back stretching and retracting of the blade in the outer cavity. The sampling operation is simple and easy to implement, the performance is reliable, the universality is good, the original state sampling effect of flow mud, sludge, mucky soil and soft plastic cohesive soil is obviously improved, the sampling quality is greatly improved, and the industrial problem is well solved.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a semi-closed pipe soil fetcher. Background technique [0002] In reconnaissance and drilling construction, it is usually necessary to use soil extractors for sampling test analysis. The structure of the existing soil fetcher for soft soil is an integral sample cylinder. After taking the soil sample, it is necessary to use a soil sample bulldozer to push out the cylindrical soil sample specimen in the sample cylinder during indoor testing. There are many difficult problems in this operation. , for example: if it is a cohesive soil sample, the soil sample will sometimes be tightly adsorbed in the drill barrel, and it is difficult to use a bulldozer to push it out; The soil sample in it is easy to fall, and even if the soil sample is brought to the ground, the soil sample structure is easily crushed and damaged during the push out process, the disturbance is large, and it is difficult to retain ...

AI Technical Summary

Problems solved by technology

The structure of the existing soil fetcher for soft soil is an integral sample cylinder. After taking the soil sample, it is necessary to use a soil sample bulldozer to push out the cylindrical soil sample specimen in the sample cylinder during indoor testing. There are many difficult problems in this operation. , for example: if it is a cohesive soil sample, the soil sample is sometimes tightly adsorbed in the drill barrel, and it is difficult to use a bulldozer to push it out; The soil sample in it is easy to fall, and even if the soil sample is brought to the ground, the soil sample structure is easily crushed and damaged during the push out process, the disturbance is large, and it is difficult to retain the original state of the soil sample, which does not meet the sample test analysis standard, resulting in a large deviation between the test index and the true value of the soil sample and large dispersion

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